/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_whois.c: Shows who a user was.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id: m_whowas.c 205 2006-01-14 19:41:10Z jon $
 */

#include "stdinc.h"
#include "whowas.h"
#include "handlers.h"
#include "client.h"
#include "common.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd.h"
#include "ircd_defs.h"
#include "numeric.h"
#include "s_serv.h"
#include "s_user.h"
#include "send.h"
#include "s_conf.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"


static void m_whowas(struct Client *, struct Client *, int, char *[]);
static void mo_whowas(struct Client *, struct Client *, int, char *[]);
static void whowas_do(struct Client *, struct Client *, int, char *[]);

struct Message whowas_msgtab = {
	"WHOWAS", 0, 0, 0, 0, MFLG_SLOW, 0,
	{m_unregistered, m_whowas, mo_whowas, m_ignore, mo_whowas, m_ignore}
};

#ifndef STATIC_MODULES
void
_modinit(void)
{
	mod_add_cmd(&whowas_msgtab);
}

void
_moddeinit(void)
{
	mod_del_cmd(&whowas_msgtab);
}

const char *_version = "$Revision: 205 $";
#endif

/*
** m_whowas
**      parv[0] = sender prefix
**      parv[1] = nickname queried
*/
static void
m_whowas(struct Client *client_p, struct Client *source_p, int parc, char *parv[])
{
	static time_t last_used = 0;

	if(parc < 2 || *parv[1] == '\0')
	{
		sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN), me.name, source_p->name);
		return;
	}

	if((last_used + ConfigFileEntry.pace_wait) > CurrentTime)
	{
		sendto_one(source_p, form_str(RPL_LOAD2HI), me.name, source_p->name);
		return;
	}
	else
		last_used = CurrentTime;

	whowas_do(client_p, source_p, parc, parv);
}

static void
mo_whowas(struct Client *client_p, struct Client *source_p, int parc, char *parv[])
{
	if(parc < 2 || *parv[1] == '\0')
	{
		sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN), me.name, source_p->name);
		return;
	}

	whowas_do(client_p, source_p, parc, parv);
}

static void
whowas_do(struct Client *client_p, struct Client *source_p, int parc, char *parv[])
{
	struct Whowas *temp = NULL;
	int cur = 0;
	int max = -1;
	char *p = NULL, *nick = NULL;

	if(parc > 2)
	{
		max = atoi(parv[2]);

		if(!MyConnect(source_p) && max > 20)
			max = 20;
	}

	if(parc > 3)
		if(hunt_server(client_p, source_p, ":%s WHOWAS %s %s :%s", 3,
			       parc, parv) != HUNTED_ISME)
			return;

	nick = parv[1];
	while(*nick == ',')
		nick++;
	if((p = strchr(nick, ',')) != NULL)
		*p = '\0';
	if(*nick == '\0')
		return;

	temp = WHOWASHASH[strhash(nick)];

	for(; temp; temp = temp->next)
	{
		if(irccmp(nick, temp->name) == 0)
		{
			sendto_one(source_p, form_str(RPL_WHOWASUSER),
				   me.name, source_p->name, temp->name,
				   temp->username,
				   IsOper(source_p) ? temp->realhost : temp->hostname,
				   temp->realname);

			if(ConfigServerHide.hide_servers && !IsOper(source_p))
				sendto_one(source_p, form_str(RPL_WHOISSERVER),
					   me.name, source_p->name, temp->name,
					   ServerInfo.network_name, myctime(temp->logoff));
			else
				sendto_one(source_p, form_str(RPL_WHOISSERVER),
					   me.name, source_p->name, temp->name,
					   temp->servername, myctime(temp->logoff));
			cur++;
		}

		if(max > 0 && cur >= max)
			break;
	}

	if(!cur)
		sendto_one(source_p, form_str(ERR_WASNOSUCHNICK), me.name, source_p->name, nick);

	sendto_one(source_p, form_str(RPL_ENDOFWHOWAS), me.name, source_p->name, parv[1]);
}
